52 Jurong Gateway Road, #11-01, Singapore 608550

Tel: 1800-34252222 ● Fax: 63344287 www.bca.gov.sg

An MND Statutory Board

See Distribution List Dear Sir/Madam, JOINT BCA / ACES / IES CIRCULAR 2019 GUIDE ON THE FORMAT OF SUBMISSION FOR STRUCTURAL PLANS Objective

This circular aims to provide a guide on the format of structural plan submissions for Qualified Persons (QPs) and Accredited Checkers (ACs). Background 2 Regulation 9 of the Building Control Regulations 2003 sets out the particulars to be shown on detailed structural plans and design calculations. In collaboration with ACES/IES, BCA has developed a guide on the format of structural plan submissions. Guide on Format of Submission 3 The guide (refer Annexes A1, A2 and B) has been developed based on industry’s comments and good practices from plan submissions. The templates in Annexes A1 and A2 provide a systematic listing of the structural elements for QPs and ACs to identify the structural elements designed/checked in their submissions. Annex B provides a guide on what could be included in design calculations which helps to clearly demonstrate the design of structural elements in a building. 4 To speed up the preparation of Annex A1 to list the structural elements designed and checked, QPs and ACs are advised to use the recommended design workflow involving data exchange between the structural analysis and design model and the BIM model as given in Annex C. This workflow is intended to allow for a more automated process of listing out the summary of structural elements. We will be organising briefing sessions to share on the proposed format of submission and the recommended design workflow. More details will be provided via Corenet at a later date. 5 Notwithstanding the contents and objective of this circular, ACs continue to have a non-delegable duty under Section 7 of Building Control (AC and ACO) Regulations to review the structural design in the plans of building works and perform their original calculations. 6 Please disseminate the contents of this letter to your members.

Our ref : APPBCA-2019-07 Date : 05/07/2019

Building Engineering Group (#12-01) Tel : 1800 342 5222

52 Jurong Gateway Road, #11-01, Singapore 608550

Tel: 1800-34252222 ● Fax: 63344287 www.bca.gov.sg

An MND Statutory Board

For Clarification 7 Please contact Mr. Tan Yu Jun at tel 1800 342 5222 or submit your enquiry through BCA’s Online Feedback Form at https://www.bca.gov.sg/feedbackform/, if you need any clarification. Thank you. Yours faithfully

Er. CHANG BEK MEI DIRECTOR for COMMISSIONER OF BUILDING CONTROL BUILDING AND CONSTRUCTION AUTHORITY

Er. CHUA TONG SENG PRESIDENT ASSOCIATION OF CONSULTING ENGINEERS SINGAPORE (ACES)

Prof YEOH LEAN WENG PRESIDENT THE INSTITUTION OF ENGINEERS, SINGAPORE (IES)

CIRCULAR DISTRIBUTION LIST PRESIDENT INSTITUTION OF ENGINEERS, SINGAPORE (IES) 70, BUKIT TINGGI ROAD SINGAPORE 289758 ies@iesnet.org.sg PRESIDENT ASSOCIATION OF CONSULTING ENGINEERS, SINGAPORE (ACES) 18 SIN MING LANE #06-01 MIDVIEW CITY SINGAPORE 573960 secretariat@aces.org.sg PRESIDENT SINGAPORE CONTRACTORS ASSOCIATION LIMITED (SCAL) CONSTRUCTION HOUSE 1 BUKIT MERAH LANE 2 SINGAPORE 159760 enquiry@scal.com.sg PRESIDENT SINGAPORE INSTITUTE OF ARCHITECTS (SIA) 79 NEIL ROAD SINGAPORE 088904 info@sia.org.sg PRESIDENT SOCIETY OF PROJECT MANAGERS (SPM) MACPHERSON ROAD P.O.BOX 1083 SINGAPORE 913412 sprojm@yahoo.com PRESIDENT SINGAPORE INSTITUTE OF BUILDING LIMITED (SIBL) 70 PALMER ROAD, #03-09C PALMER HOUSE SINGAPORE 079427 josephine@sib.com.sg PRESIDENT REAL ESTATE DEVELOPERS’ ASSOCIATION OF SINGAPORE (REDAS) 190 CLEMENCEAU AVENUE #07-01 SINGAPORE SHOPPING CENTRE SINGAPORE 239924 enquiry@redas.com PRESIDENT SINGAPORE INSTITUTE OF SURVEYORS & VALUERS (SISV) 110 MIDDLE ROAD #09-00 CHIAT HONG BUILDING SINGAPORE 188968 sisv.info@sisv.org.sg

PRESIDENT SINGAPORE STRUCTURAL STEEL SOCIETY (SSSS) 1 LIANG SEAH STREET #02-11/12 LIANG SEAH PLACE SINGAPORE 189022 secretariat@ssss.org.sg PRESIDENT GEOTECHNICAL SOCIETY OF SINGAPORE (GEOSS) C/0 CMA INTERNATIONAL CONSULTANTS PTE LTD 1 LIANG SEAH STREET #02-11 LIANG SEAH PLACE SINGAPORE 189022 geoss@cma.sg PRESIDENT PROFESSIONAL ENGINEERS BOARD, SINGAPORE (PEB) 52 JURONG GATEWAY ROAD, #07-03 SINGAPORE 608550 registrar@peb.gov.sg PRESIDENT BOARD OF ARCHITECTS (BOA) 5 MAXWELL ROAD 1ST STOREY TOWER BLOCK MND COMPLEX SINGAPORE 069110 boarch@singnet.com.sg DIRECTOR PROTECTIVE INFRASTRUCTURE & ESTATE DEFENCE SCIENCE & TECHNOLOGY AGENCY 1 DEPOT ROAD #03-01J SINGAPORE 109679 oyewhing@dsta.gov.sg DIRECTOR OF INFRASTRUCTURE SCHOOL CAMPUS DEPARTMENT MINISTRY OF EDUCATION 1 NORTH BUONA VISTA DRIVE SINGAPORE 138675 choo_boon_chiao@moe.gov.sg DIRECTOR BEST SOURCING DEPARTMENT PUBLIC UTILITIES BOARD 40 SCOTTS ROAD #18-01 ENVIRONMENT BUILDING SINGAPORE 228231 koh_boon_aik@pub.gov.sg lim_kim_tee@pub.gov.sg

DEPUTY CHIEF EXECUTIVE INFRASTRUCTURE & DEVELOPMENT LAND TRANSPORT AUTHORITY 1 HAMPSHIRE ROAD BLOCK 8 LEVEL 1 SINGAPORE 219428 chong_kheng_chua@lta.gov.sg DEPUTY DIRECTOR PROJECT DEVT & MGT SECT 1 (C&S) BUILDING QUALITY GROUP HOUSING & DEVELOPMENT BOARD HDB HUB 480 LORONG 6 TOA PAYOH SINGAPORE 310480 low_kiang_heng@hdb.gov.sg AG DIRECTOR TECHNICAL SERVICES DIVISION JTC CORPORATION THE JTC SUMMIT 8 JURONG TOWN HALL ROAD SINGAPORE 609434 tan_su_chern@jtc.gov.sg DIRECTOR BUILDING PEOPLE’S ASSOCIATION 9 STADIUM LINK SINGAPORE 397750 foo_soon_leng@pa.gov.sg PRESIDENT THE TUNNELLING AND UNDERGROUND CONSTRUCTION SOCIETY SINGAPORE (TUCSS) C/O CMA INTERNATIONAL CONSULTANTS PTE LTD 1 LIANG SEAH STREET #02-12 LIANG SEAH PLACE SINGAPORE 189022 info@tucss.org.sg PRESIDENT SOCIETY OF ROCK MECHANICS AND ENGINEERING GEOLOGY 1 LIANG SEAH STREET #02-12 LIANG SEAH PLACE SINGAPORE 189022 srmeg@cma.sg DEPUTY CHIEF EXECUTIVE OFFICER SENTOSA DEVELOPMENT CORPORATION 33 ALLANBROOKE ROAD, SENTOSA SINGAPORE 099981 agencies_circulars@sentosa.com.sg

HEAD (FIRE SAFETY AND BUILDING CONTROL) BUILDING AND INFRASTRUCTURE DEFENCE SCIENCE & TECHNOLOGY AGENCY 1 DEPOT ROAD DEFENCE TECHNOLOGY TOWER A SINGAPORE 109679 HOW AH MENG EMAIL: hahmeng@dsta.gov.sg DIRECTOR BUILDING AND INFRASTRUCTURE DEFENCE SCIENCE & TECHNOLOGY AGENCY 1 DEPOT ROAD DEFENCE TECHNOLOGY TOWER A SINGAPORE 109679 EMAIL: lee_eng_hua@dsta.gov.sg ALL CORENET E-INFO SUBSRIBERS

Annex A1

Summary for Design and Checking of Structural Elements [to be submitted together by QP and AC]

Project Ref. No. : _______________________________ ST Ref No. : ________ Project Description: __________________________________________________ __________________________________________________________________ __________________________________________________________________

Summary of Structural Elements Sheet AC should ensure that he has checked all the key structural elements.

S/N Type of structural elements*

Element markings in structural

plan

QP AC1

Design Calculations2

Element markings3

Page numbers

Element markings3

Page numbers

1 Footing

F1 to F4, F4a, F5 to F7

Same as plan 5-15 Same as plan

5 – 18

2 Level 1 Beams

1B1 to 1B10 A-1 to A-10

16-30

Same as plan

19 - 39

3 Level 2 Beams

2B1 to 2B5, 2B6 (transfer), 2B7 to 2B10

A-11 to A-20 Refer to Level 1 Beams

Same as plan

40 – 60

4 Typical Floor Beams

3B1 to 3B10, 4B1 to 4B10

A-21 to A-40 31-55 Same as plan

61 – 90

5 Columns 1C1 to 1C8, 2C1 to 2C8, 2C9 to 2C10 (transfer), 3C1 to 3C10

Same as plan 56-71 C1 – C28 91-115

6 Slabs S1 – S10 Same as plan 72-90 NA NA

7 Steel Connections

Details A - G Same as plan 91-101 Same as plan

116-126

Annex A1

1 AC to indicate ‘NA” for elements not checked for under his scope. 2 Design calculations shall be as defined in Building Control Regulations Section 9.

3 Where QP/AC indicates element markings in design calculations as “same as plan” or equivalent, all the structural elements listed under “Element markings in structural plan” shall be deemed to be designed and checked by QP/AC. ______________________________

July 2019

S/N Type of structural elements*

Element markings in structural

plan

QP AC1

Design Calculations2

Element markings3

Page numbers

Element markings3

Page numbers

* All structural elements in the project to be designed/checked, e.g. piles/ earth retaining structures/ retaining walls/ columns/ walls/ beams/ slabs/staircase/barrier. _______________________________ __________________________________ Stamp & Signature of Qualified Person Stamp & Signature of Accredited Checker

Annex A2

July 2019

Summary for Design and Checking of Structural Elements [to be submitted by QP and AC separately]

Project Ref. No. : _______________________________ ST Ref No. : ________ Project Description: __________________________________________________ __________________________________________________________________ __________________________________________________________________

Grouping of Structural Elements Sheet

S/N Type of

structural elements*

Element markings in structural plan

Designed structural elements that are similar

Remarks

1 Beam or N.A.

3B1, 3B2, 3B3, 3B4, 3B5 or N.A.

2B1, 2B2, 2B3, 2B4, 2B5 or [to indicate N.A. if there is no grouping in the design]

Typical floor

* All structural elements in the project to be designed/checked, e.g. piles/ earth retaining structures/ retaining walls/ columns/ walls/ beams/ slabs/staircase/barrier. _______________________________________ Stamp & Signature of Qualified Person/ Accredited Checker

Annex B

July 2019

Format of design calculations and essential information to include

(1) Design calculations should be in PDF format that is able to allow searching

base on key words

(2) For the Structural Summary Sheet, to provide a synopsis of the structural

design giving –

(i) a general description of the foundation and structural system and the

basic anatomy of stability by which the applied loads are transferred to

the ground; and

(ii) design method, assumptions, codes used and limitations of stresses and

deformation

(3) For the analysis software used, it should include

• Design input data with computer-generated graphics or hand sketch

showing the framing & layout of the structure, location of nodes & elements,

joint fixity, element section assignments (refer to Figures 1 to 3), loadings

(refer to Figures 5 & 6), materials, etc.

• the floor layouts with markings of all structural elements (refer to Figure

4)

• summary of salient output results (including pictorial illustrations) e.g.

the design envelopes of moment, shear, displacement of the most critical

cases for the design and check of the applied forces against the output

overall reaction (refer to Figures 7 to 12)

• the interpretation and application of the computer output in the design;

(4) Essential information on the design to resist wind load, including–

• a general description of the wind-resisting system and mathematical

modelling;

• diagrams illustrating the location and identification of all structural frames

and members in the wind-resisting system;

• principal reactions (moments, shear forces and axial forces) in the wind-

resisting elements; and

• a summary of equilibrium checks on applied lateral forces and calculated

reactions of vertical structural members at foundation and other critical

levels where there is a major change in structural configuration

Annex B

July 2019

(5) Essential information on the design to resist dead and imposed loads, including–

• the design data on dead and imposed loads (including allowance for

partitions, screeds, dynamic effects and the like); and

• a summary of principal reactions (moments, shear forces and axial

forces) in vertical structural members at foundation and all floor levels;

• Details of the design of major transfer members where the failure of which

would induce cumulative instability; and

• Details of the design of cantilevered canopies, balconies and major

structural appendages

Annex B

July 2019

Examples of framing and layout of the structure in Design Calculations

Fig. 1 - 3D illustration of analysis model

Annex B

July 2019

Fig. 2 - Plan layout with beam/slab section properties in design calculations

Annex B

July 2019

Fig. 3 - Elevation with column section properties in design calculations

Annex B

July 2019

Example of presentation of element markings in Design Calculations if they are different from plan

Fig. 4 - Beam layout in design calculation and structural plan

To show in Design calculation Shown in Structural plan

Annex B

July 2019

Examples to show load inputs clearly in Design Calculations

Fig. 5 - Visual representation of loadings on slabs

Annex B

July 2019

Fig. 6 - Visual representation of loadings on beams

Annex B

July 2019

Examples of Summary of salient output results (including pictorial illustrations)

Fig. 7 - Summary of salient output results

Fig. 8 - Summary of salient output results (pictorial)

Annex B

July 2019

Examples of Summary of Design in Design Calculation

Fig. 9 - Summary of beam design with the beam labels in one plan (same as structural plan)

Annex B

July 2019

Fig. 10 - Summary of beam design with beam labels

Annex B

July 2019

Fig. 11 - Beam design and beam layout plan shown in design calculations

B19

Beam design is easily identified with beam layout markings

Annex B

July 2019

Fig. 12 - Beam analysis and design with beam markings (same as structural plan) shown in design calculation

Annex C

July 2019

Recommended Design Workflow using BIM

*A&D model refers to 3-D model in the analysis & design software

Import A&D model with properties (e.g. element ID, geometry, dimensions, material

properties, support conditions)

into BIM modelling software

A&D MODEL*

BIM MODEL

Update A&D model properties (e.g. geometry, dimensions,

material properties) from BIM model

DATA EXCHANGE between models through available plug-ins